As you said you haven't heard your babys heartbeat i've found this to give you an idea - I thought someone had posted their recording on here over the last 2 months but cant find it.
I dont no this person- just found on youtube!
http://www.youtube.com/watch?v=qMZv990BPBI&feature=related
I dont no this person- just found on youtube!
http://www.youtube.com/watch?v=qMZv990BPBI&feature=related